rugk / xenforo-threema-gateway

            return false;

        }

        if (!$this->getCryptTool()->stringCompare(

            $options->threema_gateway_receivecallback,

            $this->filtered['accesstoken']

        )) {

            $errorString = [null, 'Unverified request: access token invalid', 'Unverified request'];

            return false;

        }

        // HMAC validation (verifies integrity of request)

        if (!$this->getE2EHelper()->checkMac(

    public function validateFormalities(&$errorString)

    {

        // simple, formal validation of Gateway ID

        if (!$this->getCryptTool()->stringCompare($this->filtered['to'], $this->settings->getId())) {

            $errorString = [null, 'Invalid request: formal verification failed', 'Invalid request'];

            return false;

        }

        /** @var XenForo_Options $options */

        $options   = XenForo_Application::getOptions();